Validation of WFM-DOAS V0.6 CO and V1.0 CH4 scientific products using European ground-based FTIR measurements
De Mazière, M.
Fourier transform infrared spectroscopy
Near infrared channels
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New WFM-DOAS retrieval algorithm products, CO (v0.6) and CH4 (v1.0) have recently become available. The total column amounts of these CO and CH4 products, retrieved from SCIAMACHY nadir observations in its near-infrared channels, have been compared to data from a European harmonized FTIR network as developed during the UFTIR project (http://www.nilu.no/uftir). The years considered are 2003 and 2004 only (the new WFM-DOAS data is also available for the year 2005). Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of reliable coincidences that satisfy the temporal and spatial collocation criteria, the SCIAMACHY data have been compared with a temporal 3rd order polynomial interpolation of the ground-based data. For comparison purposes we have also compared the old v0.5 datasets with the same FTIR measurement ensemble. The validation shows a clear improvement of the data quality with the new version products.
CitationDils, B.; De Mazière, M.; Blumenstock, T.; Hase, F.; Kramer, I.; Mahieu, E.; Demoulin, P.; Duchatelet, P.; Mellqvist, J.; Strandberg, A.; Buchwitz, M.; Khlystova, I.; Schneising, O.; Velazco, V.; Notholt, J.; Sussmann, R.; Stremme, W. (2007). Validation of WFM-DOAS V0.6 CO and V1.0 CH4 scientific products using European ground-based FTIR measurements. , ESA-SP 642: Proceedings of the Third Workshop on the Atmospheric Chemistry Validation of Envisat (ACVE-3), Vol. 642,